The Twin Sisters Mtns is a chromium mine located in Skagit county, Washington at an elevation of 3,999 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Elevation: 3,999 Feet (1,219 Meters)
Commodity: Chromium
Lat, Long: 48.64, -121.89833
Map: View on Google Maps
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Twin Sisters Mtns MRDS details
Site Name
Primary: Twin Sisters Mtns
Commodity
Primary: Chromium
Location
State: Washington
County: Skagit
District: Hamilton District
Land Status
Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Holdings
Not available
Workings
Not available
Ownership
Owner Name: Twin Sisters Magnesium And Chrome Corp., Seattle, Wash.
Years: 1955 -
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Pacific Mountain System
Physiographic Province: Cascade-Sierra Mountains
Physiographic Section: Northern Cascade Mountains
Mineral Deposit Model
Model Name: Podiform chromite (minor)
Orebody
Form: PODS, BANDS, MASSIVE, DISSEMINATED
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Chromite
Gangue: Dunite
Gangue: Olivine
Comments
Comment (Workings): WORKINGS UNKNOWN
Comment (Deposit): DEVELOPMENT IN 1955, 1957. ; INFO.SRC : 1 PUB LIT
Comment (Deposit): MRDS RECORD US53003 HAS BEEN MERGED WITH THIS RECORD AND DELETED
Comment (Location): TWIN SISTERS MTNS (SE END), THREE LAKES AREA; ELEVATION IS APPROXIMATE.
Comment (Development): UNKNOWN DEVELOPMENT
Comment (Deposit): CHROMITE APPEARS AS SMALL PODS, BANDS, AND DISSEMINATED GRAINS IN DUNITE.
References
Reference (Deposit): HUNTTING, M.T., 1956, INVENTORY OF WASHINGTON MINERALS, PART II, METALLIC MINERALS: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 37, V. 1, P. 40.
Reference (Deposit): WASHINGTON DIVISION OF MINES AND GEOLOGY INFORMATION CIRCULAR 24, P. 16
Reference (Deposit): WASHINGTON DIVISION OF MINES AND GEOLOGY INFORMATION CIRCULAR 27, P. 18.
Washington Gold
"Where to Find Gold in Washington" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Arizona. Read more: Where to Find Gold in Washington.